Dynamic sweep angle measurement for fault monitoring of windshield wiper systems

a technology of windshield wipers and sweep angles, which is applied in vehicle maintenance, vehicle cleaning, transportation and packaging, etc., can solve the problem that wws is not typically expected to have any movement or flutter

Active Publication Date: 2021-02-18
ROSEMOUNT AEROSPACE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0023]In accordance with additional or alternative embodiments, the sweep angle feedback signal has a negligible parallax error.
[0024]In accordance with additional or alternative embodiments, the method further includes at least one of in-flight gear and shaft and real-time sweep angle monitoring based on the sweep angle feedback signal, computing a speed of a motor configured to drive the wiper blade assembly and facilitating an identification of ageing issues or failures of the motor, the wiper blade assembly or a gear train interposed between the motor and the wiper blade assembly.

Problems solved by technology

The WWS is not typically expected to have any movement or flutter when it is non-operational under all loading conditions.

Method used

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  • Dynamic sweep angle measurement for fault monitoring of windshield wiper systems
  • Dynamic sweep angle measurement for fault monitoring of windshield wiper systems
  • Dynamic sweep angle measurement for fault monitoring of windshield wiper systems

Examples

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Embodiment Construction

[0034]A conventional WWS can include an intelligent device with a controller or processor that provides a motor commutation sequence and monitors system faults, an internal wiper trigger that detects an end of sweep position of an external wiper blade, a park sensor feedback system with an end of sweep (EoS) sensor that detects the end of sweep position of the WWS by monitoring the internal wiper trigger, Hall sensor feedback to measure a speed of a motor of the WWS, motor current feedback to monitor motor winding currents, motor winding temperature feedback to monitor temperatures of the motor windings, a mechanical gear train and four bar link mechanism and a wiper arm and blade. The mechanical gear train and the four bar link mechanism converts rotary motion of the motor to oscillatory motion and the wiper arm and blade is driven by the oscillatory motion to wipe the windshield.

[0035]Thus, in the conventional WWS, it is seen that Hall sensors are used to detect a speed of the mot...

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Abstract

A windshield wiper system (WWS) is provided and includes a wiper blade assembly drivable along a first sweep angle, an internal wiper trigger disposed to move with the wiper blade assembly, a measurement system configured to monitor a position of the internal wiper trigger from which a corresponding position of the wiper blade assembly relative to the first sweep angle is measurable and to output a sweep angle feedback signal corresponding to monitoring results and a controller. The controller is receptive of the sweep angle feedback signal.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of Indian Patent Application No. 201911032887, filed Aug. 14, 2019, which is incorporated herein by reference in its entirety.BACKGROUND[0002]The following description relates to windshield wiper systems (WWSs) and, more specifically, to dynamic sweep angle measurement for fault monitoring of a WWS.[0003]A WWS is typically employed on a vehicle, such as an aircraft, to clear moisture or foreign object debris from a windshield and to allow for improved visibility. For example, a WWS on an aircraft can be used to improve visibility for pilots or co-pilots during take-off or landing operations.[0004]To ensure that a WWS provides for required coverage on a windshield, the WWS will generally be designed to move through a specific wipe or sweep angle. This sweep angle can be controlled with or without a four bar mechanism designed to configured the WWS to sweep through the specific angle and return to a park p...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B60S1/34B60S1/08B60S1/26
CPCB60S1/3409B60S1/26B60S1/08
Inventor MANJUNATH, ARUNAMOTHE, VENKATA ANIL KUMARVADGAONKAR, PRASHANT
Owner ROSEMOUNT AEROSPACE
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